Best-Stays.com, a site for travelers. 2010
The search of locations on this site is based on GPS coordinates: longitude and latitude.
You indicate where you want to stay by double clicking on the map (or dragging the marker)
and the system will tell you what is nearby. You even get a street view, if available,
thanks to Google Maps. Instant translation of descriptions and comments, thanks to Google Translate.
Completely HTML Tidy.

Rebuilding E.S.T. with integrated animation feedback. (E.S.T. = E-learning based Speech Therapy) 2015
The old E.S.T. showed two graphs, pitch and intensity, as feedback for speech.
It turned out, patients found this hard to understand. Therefor Sint Maartenskliniek in cooperation with Radboud University Nijmegen tested animated feedback (see above), which turned out well.
Regrettably the old system was too rigid to implement the animated feedback.
Sint Maartenskliniek decided to rebuild the whole system from scratch with open source tools.